12-09-2017, 10:46 AM
11
Re: The Search For A New Earth
Originally Posted by Cinderella
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http://www.telegraph.co.uk/culture/h...200-years.htmlScary or what!
Spectacles, hearing aids, pacemakers, prosthetic limbs and - he's just been on the programme I am watching - Stephen Hawkings - motorised wheelchair and voice synthesizer.
12-09-2017, 10:50 AM
12
Re: The Search For A New Earth
Originally Posted by Cinderella
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http://www.telegraph.co.uk/culture/h...200-years.htmlScary or what!
12-09-2017, 10:51 AM
13
Re: The Search For A New Earth
Originally Posted by Cinderella
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The programme explains the research being done to overcome the many problems.
It's still pie in the sky (not literally) of course, but if such things can be achieved we could have people travelling there and back in a single lifetime.
Even with such rapid travelling times, though, we could not send messages as radio waves travel at the speed of light: still thousands of years in this case.
12-09-2017, 05:16 PM
14
Re: The Search For A New Earth
Originally Posted by JBR
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Yes, I'm watching it now and hear that someone is predicting that new propulsion methods could get us to Alpha Centauri in only 20 years. That would mean travelling faster than light! Theoretically impossible.It's still pie in the sky (not literally) of course, but if such things can be achieved we could have people travelling there and back in a single lifetime.
Even with such rapid travelling times, though, we could not send messages as radio waves travel at the speed of light: still thousands of years in this case.
A propulsion system designed to get to Proxima B in 20 years would have to travel at .211 velocity of light, not allowing for acceleration/deceleration. Interestingly, for the people travelling, the journey would take 19 years 6 months due to time dilation with general relativity.
The fun comes when you try to accelerate to velocities approaching closer to the speed of light. If you could obtain 80% light speed, the trip would only take just over three years for those on board.
A radio signal from Proxima would only take 4.22 years to reach us because Proxima is 4.22 light years away.
12-09-2017, 05:36 PM
15
Re: The Search For A New Earth
Originally Posted by Graham
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Not quite. A propulsion system designed to get to Proxima B in 20 years would have to travel at .211 velocity of light, not allowing for acceleration/deceleration. Interestingly, for the people travelling, the journey would take 19 years 6 months due to time dilation with general relativity.
The fun comes when you try to accelerate to velocities approaching closer to the speed of light. If you could obtain 80% light speed, the trip would only take just over three years for those on board.
A radio signal from Proxima would only take 4.22 years to reach us because Proxima is 4.22 light years away.
Should this suggested 20 year journey every be achieved, then yes, it would be a practical solution. Nevertheless, we have a very long way to go before that can be done, if ever.
12-09-2017, 05:45 PM
16
Re: The Search For A New Earth
Originally Posted by JBR
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Thank you. I stand corrected.Should this suggested 20 year journey every be achieved, then yes, it would be a practical solution. Nevertheless, we have a very long way to go before that can be done, if ever.
12-09-2017, 05:53 PM
17
Re: The Search For A New Earth
I suspect that it would take a 100 years to get all the committees in place just to discuss who is going to build the rocket, who is going to pay for it, who will crew it and which famous passengers with lots of money will get the chance to leave Earth .....Just a thought...talking of passengers, and if the spaceship was about to launch, who would you nominate to go...?
I am nominating Jeremy and Diane, their offspring would be big on Socialism but short on financial skills.
Any other nominees?
12-09-2017, 06:19 PM
18
Re: The Search For A New Earth
Originally Posted by Rehab44
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I suspect that it would take a 100 years to get all the committees in place just to discuss who is going to build the rocket, who is going to pay for it, who will crew it and which famous passengers with lots of money will get the chance to leave Earth .....Just a thought...talking of passengers, and if the spaceship was about to launch, who would you nominate to go...?
I am nominating Jeremy and Diane, their offspring would be big on Socialism but short on financial skills.
Any other nominees?
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